Fix groff "empty input lines" warning

[florianernst]

Hello there,

groff doesn't like empty lines and emits a corresponding warning.

I take it you mean

Index: libdnet/man/dnet.3
===================================================================
--- libdnet.orig/man/dnet.3
+++ libdnet/man/dnet.3
@@ -861,6 +861,6 @@ some adjustments to header include direc
 .Sh AUTHORS
 Dug Song
 .Aq dugsong@monkey.org
-
+.br
 Oliver Falk
 .Aq oliver@linux-kernel.at
Index: libdnet/test/dnet/dnet.8
===================================================================
--- libdnet.orig/test/dnet/dnet.8
+++ libdnet/test/dnet/dnet.8
@@ -267,6 +267,6 @@ some adjustments to header include direc
 .Sh AUTHORS
 Dug Song
 .Aq dugsong@monkey.org
-
+.br
 Oliver Falk
 .Aq oliver@linux-kernel.at

or similar.

Cheers, Flo

[ofalk]

This was already partially addressed already, but thanks for spotting the other one!